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LCOV - code coverage report
Current view: top level - ext/bz2 - bz2.c (source / functions) Hit Total Coverage
Test: PHP Code Coverage Lines: 179 201 89.1 %
Date: 2014-04-19 Functions: 17 17 100.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /*
       2             :   +----------------------------------------------------------------------+
       3             :   | PHP Version 5                                                        |
       4             :   +----------------------------------------------------------------------+
       5             :   | Copyright (c) 1997-2014 The PHP Group                                |
       6             :   +----------------------------------------------------------------------+
       7             :   | This source file is subject to version 3.01 of the PHP license,      |
       8             :   | that is bundled with this package in the file LICENSE, and is        |
       9             :   | available through the world-wide-web at the following url:           |
      10             :   | http://www.php.net/license/3_01.txt                                  |
      11             :   | If you did not receive a copy of the PHP license and are unable to   |
      12             :   | obtain it through the world-wide-web, please send a note to          |
      13             :   | license@php.net so we can mail you a copy immediately.               |
      14             :   +----------------------------------------------------------------------+
      15             :   | Author: Sterling Hughes <sterling@php.net>                           |
      16             :   +----------------------------------------------------------------------+
      17             : */
      18             :  
      19             : /* $Id$ */
      20             : 
      21             : #ifdef HAVE_CONFIG_H
      22             : #include "config.h"
      23             : #endif
      24             : 
      25             : #include "php.h"
      26             : #include "php_bz2.h"
      27             : 
      28             : #if HAVE_BZ2
      29             : 
      30             : /* PHP Includes */
      31             : #include "ext/standard/file.h"
      32             : #include "ext/standard/info.h"
      33             : #include "ext/standard/php_string.h"
      34             : 
      35             : /* for fileno() */
      36             : #include <stdio.h>
      37             : 
      38             : /* Internal error constants */
      39             : #define PHP_BZ_ERRNO   0
      40             : #define PHP_BZ_ERRSTR  1
      41             : #define PHP_BZ_ERRBOTH 2
      42             : 
      43             : static PHP_MINIT_FUNCTION(bz2);
      44             : static PHP_MSHUTDOWN_FUNCTION(bz2);
      45             : static PHP_MINFO_FUNCTION(bz2);
      46             : static PHP_FUNCTION(bzopen);
      47             : static PHP_FUNCTION(bzread);
      48             : static PHP_FUNCTION(bzerrno);
      49             : static PHP_FUNCTION(bzerrstr);
      50             : static PHP_FUNCTION(bzerror);
      51             : static PHP_FUNCTION(bzcompress);
      52             : static PHP_FUNCTION(bzdecompress);
      53             : 
      54             : /* {{{ arginfo */
      55             : ZEND_BEGIN_ARG_INFO_EX(arginfo_bzread, 0, 0, 1)
      56             :         ZEND_ARG_INFO(0, bz)
      57             :         ZEND_ARG_INFO(0, length)
      58             : ZEND_END_ARG_INFO()
      59             : 
      60             : ZEND_BEGIN_ARG_INFO(arginfo_bzopen, 0)
      61             :         ZEND_ARG_INFO(0, file)
      62             :         ZEND_ARG_INFO(0, mode)
      63             : ZEND_END_ARG_INFO()
      64             : 
      65             : ZEND_BEGIN_ARG_INFO(arginfo_bzerrno, 0)
      66             :         ZEND_ARG_INFO(0, bz)
      67             : ZEND_END_ARG_INFO()
      68             : 
      69             : ZEND_BEGIN_ARG_INFO(arginfo_bzerrstr, 0)
      70             :         ZEND_ARG_INFO(0, bz)
      71             : ZEND_END_ARG_INFO()
      72             : 
      73             : ZEND_BEGIN_ARG_INFO(arginfo_bzerror, 0)
      74             :         ZEND_ARG_INFO(0, bz)
      75             : ZEND_END_ARG_INFO()
      76             : 
      77             : ZEND_BEGIN_ARG_INFO_EX(arginfo_bzcompress, 0, 0, 2)
      78             :         ZEND_ARG_INFO(0, source)
      79             :         ZEND_ARG_INFO(0, blocksize)
      80             :         ZEND_ARG_INFO(0, workfactor)
      81             : ZEND_END_ARG_INFO()
      82             : 
      83             : ZEND_BEGIN_ARG_INFO_EX(arginfo_bzdecompress, 0, 0, 1)
      84             :         ZEND_ARG_INFO(0, source)
      85             :         ZEND_ARG_INFO(0, small)
      86             : ZEND_END_ARG_INFO()
      87             : 
      88             : ZEND_BEGIN_ARG_INFO_EX(arginfo_bzwrite, 0, 0, 2)
      89             :         ZEND_ARG_INFO(0, fp)
      90             :         ZEND_ARG_INFO(0, str)
      91             :         ZEND_ARG_INFO(0, length)
      92             : ZEND_END_ARG_INFO()
      93             : 
      94             : ZEND_BEGIN_ARG_INFO(arginfo_bzflush, 0)
      95             :         ZEND_ARG_INFO(0, fp)
      96             : ZEND_END_ARG_INFO()
      97             : /* }}} */
      98             : 
      99             : static const zend_function_entry bz2_functions[] = {
     100             :         PHP_FE(bzopen,       arginfo_bzopen)
     101             :         PHP_FE(bzread,       arginfo_bzread)
     102             :         PHP_FALIAS(bzwrite,   fwrite,           arginfo_bzwrite)
     103             :         PHP_FALIAS(bzflush,   fflush,           arginfo_bzflush)
     104             :         PHP_FALIAS(bzclose,   fclose,           arginfo_bzflush)
     105             :         PHP_FE(bzerrno,      arginfo_bzerrno)
     106             :         PHP_FE(bzerrstr,     arginfo_bzerrstr)
     107             :         PHP_FE(bzerror,      arginfo_bzerror)
     108             :         PHP_FE(bzcompress,   arginfo_bzcompress)
     109             :         PHP_FE(bzdecompress, arginfo_bzdecompress)
     110             :         PHP_FE_END
     111             : };
     112             : 
     113             : zend_module_entry bz2_module_entry = {
     114             :         STANDARD_MODULE_HEADER,
     115             :         "bz2",
     116             :         bz2_functions,
     117             :         PHP_MINIT(bz2),
     118             :         PHP_MSHUTDOWN(bz2),
     119             :         NULL,
     120             :         NULL,
     121             :         PHP_MINFO(bz2),
     122             :         NO_VERSION_YET,
     123             :         STANDARD_MODULE_PROPERTIES
     124             : };
     125             : 
     126             : #ifdef COMPILE_DL_BZ2
     127             : ZEND_GET_MODULE(bz2)
     128             : #endif
     129             : 
     130             : struct php_bz2_stream_data_t {
     131             :         BZFILE *bz_file;
     132             :         php_stream *stream;
     133             : };
     134             : 
     135             : /* {{{ BZip2 stream implementation */
     136             : 
     137          10 : static size_t php_bz2iop_read(php_stream *stream, char *buf, size_t count TSRMLS_DC)
     138             : {
     139          10 :         struct php_bz2_stream_data_t *self = (struct php_bz2_stream_data_t *) stream->abstract;
     140             :         size_t ret;
     141             :         
     142          10 :         ret = BZ2_bzread(self->bz_file, buf, count);
     143             : 
     144          10 :         if (ret == 0) {
     145           3 :                 stream->eof = 1;
     146             :         }
     147             : 
     148          10 :         return ret;
     149             : }
     150             : 
     151          15 : static size_t php_bz2iop_write(php_stream *stream, const char *buf, size_t count TSRMLS_DC)
     152             : {
     153          15 :         struct php_bz2_stream_data_t *self = (struct php_bz2_stream_data_t *) stream->abstract;
     154             : 
     155          15 :         return BZ2_bzwrite(self->bz_file, (char*)buf, count); 
     156             : }
     157             : 
     158          16 : static int php_bz2iop_close(php_stream *stream, int close_handle TSRMLS_DC)
     159             : {
     160          16 :         struct php_bz2_stream_data_t *self = (struct php_bz2_stream_data_t *)stream->abstract;
     161          16 :         int ret = EOF;
     162             :         
     163          16 :         if (close_handle) {
     164          16 :                 BZ2_bzclose(self->bz_file);
     165             :         }
     166             : 
     167          16 :         if (self->stream) {
     168           7 :                 php_stream_free(self->stream, PHP_STREAM_FREE_CLOSE | (close_handle == 0 ? PHP_STREAM_FREE_PRESERVE_HANDLE : 0));
     169             :         }
     170             : 
     171          16 :         efree(self);
     172             : 
     173          16 :         return ret;
     174             : }
     175             : 
     176          16 : static int php_bz2iop_flush(php_stream *stream TSRMLS_DC)
     177             : {
     178          16 :         struct php_bz2_stream_data_t *self = (struct php_bz2_stream_data_t *)stream->abstract;
     179          16 :         return BZ2_bzflush(self->bz_file);
     180             : }
     181             : /* }}} */
     182             : 
     183             : php_stream_ops php_stream_bz2io_ops = {
     184             :         php_bz2iop_write, php_bz2iop_read,
     185             :         php_bz2iop_close, php_bz2iop_flush,
     186             :         "BZip2",
     187             :         NULL, /* seek */
     188             :         NULL, /* cast */
     189             :         NULL, /* stat */
     190             :         NULL  /* set_option */
     191             : };
     192             : 
     193             : /* {{{ Bzip2 stream openers */
     194          16 : PHP_BZ2_API php_stream *_php_stream_bz2open_from_BZFILE(BZFILE *bz, 
     195             :                                                                                                                 char *mode, php_stream *innerstream STREAMS_DC TSRMLS_DC)
     196             : {
     197             :         struct php_bz2_stream_data_t *self;
     198             :         
     199          16 :         self = emalloc(sizeof(*self));
     200             : 
     201          16 :         self->stream = innerstream;
     202          16 :         self->bz_file = bz;
     203             : 
     204          16 :         return php_stream_alloc_rel(&php_stream_bz2io_ops, self, 0, mode);
     205             : }
     206             : 
     207          10 : PHP_BZ2_API php_stream *_php_stream_bz2open(php_stream_wrapper *wrapper,
     208             :                                                                                         char *path,
     209             :                                                                                         char *mode,
     210             :                                                                                         int options,
     211             :                                                                                         char **opened_path,
     212             :                                                                                         php_stream_context *context STREAMS_DC TSRMLS_DC)
     213             : {
     214          10 :         php_stream *retstream = NULL, *stream = NULL;
     215          10 :         char *path_copy = NULL;
     216          10 :         BZFILE *bz_file = NULL;
     217             : 
     218          10 :         if (strncasecmp("compress.bzip2://", path, 17) == 0) {
     219           0 :                 path += 17;
     220             :         }
     221          10 :         if (mode[0] == '\0' || (mode[0] != 'w' && mode[0] != 'r' && mode[1] != '\0')) {
     222           0 :                 return NULL;
     223             :         }
     224             : 
     225             : #ifdef VIRTUAL_DIR
     226             :         virtual_filepath_ex(path, &path_copy, NULL TSRMLS_CC);
     227             : #else
     228          10 :         path_copy = path;
     229             : #endif  
     230             : 
     231          10 :         if (php_check_open_basedir(path_copy TSRMLS_CC)) {
     232           0 :                 return NULL;
     233             :         }
     234             :         
     235             :         /* try and open it directly first */
     236          10 :         bz_file = BZ2_bzopen(path_copy, mode);
     237             : 
     238          10 :         if (opened_path && bz_file) {
     239           0 :                 *opened_path = estrdup(path_copy);
     240             :         }
     241          10 :         path_copy = NULL;
     242             :         
     243          10 :         if (bz_file == NULL) {
     244             :                 /* that didn't work, so try and get something from the network/wrapper */
     245           1 :                 stream = php_stream_open_wrapper(path, mode, options | STREAM_WILL_CAST, opened_path);
     246             :         
     247           1 :                 if (stream) {
     248             :                         int fd;
     249           0 :                         if (SUCCESS == php_stream_cast(stream, PHP_STREAM_AS_FD, (void **) &fd, REPORT_ERRORS)) {
     250           0 :                                 bz_file = BZ2_bzdopen(fd, mode);
     251             :                         }
     252             :                 }
     253             : 
     254             :                 /* remove the file created by php_stream_open_wrapper(), it is not needed since BZ2 functions
     255             :                  * failed.
     256             :                  */
     257           1 :                 if (opened_path && !bz_file && mode[0] == 'w') {
     258           0 :                         VCWD_UNLINK(*opened_path);
     259             :                 }
     260             :         }
     261             :         
     262          10 :         if (bz_file) {
     263           9 :                 retstream = _php_stream_bz2open_from_BZFILE(bz_file, mode, stream STREAMS_REL_CC TSRMLS_CC);
     264           9 :                 if (retstream) {
     265           9 :                         return retstream;
     266             :                 }
     267             : 
     268           0 :                 BZ2_bzclose(bz_file);
     269             :         }
     270             : 
     271           1 :         if (stream) {
     272           0 :                 php_stream_close(stream);
     273             :         }
     274             : 
     275           1 :         return NULL;
     276             : }
     277             : 
     278             : /* }}} */
     279             : 
     280             : static php_stream_wrapper_ops bzip2_stream_wops = {
     281             :         _php_stream_bz2open,
     282             :         NULL, /* close */
     283             :         NULL, /* fstat */
     284             :         NULL, /* stat */
     285             :         NULL, /* opendir */
     286             :         "BZip2",
     287             :         NULL, /* unlink */
     288             :         NULL, /* rename */
     289             :         NULL, /* mkdir */
     290             :         NULL  /* rmdir */
     291             : };
     292             : 
     293             : static php_stream_wrapper php_stream_bzip2_wrapper = {
     294             :         &bzip2_stream_wops,
     295             :         NULL,
     296             :         0 /* is_url */
     297             : };
     298             : 
     299             : static void php_bz2_error(INTERNAL_FUNCTION_PARAMETERS, int);
     300             : 
     301       20133 : static PHP_MINIT_FUNCTION(bz2)
     302             : {
     303       20133 :         php_register_url_stream_wrapper("compress.bzip2", &php_stream_bzip2_wrapper TSRMLS_CC);
     304       20133 :         php_stream_filter_register_factory("bzip2.*", &php_bz2_filter_factory TSRMLS_CC);
     305       20133 :         return SUCCESS;
     306             : }
     307             : 
     308       20169 : static PHP_MSHUTDOWN_FUNCTION(bz2)
     309             : {
     310       20169 :         php_unregister_url_stream_wrapper("compress.bzip2" TSRMLS_CC);
     311       20169 :         php_stream_filter_unregister_factory("bzip2.*" TSRMLS_CC);
     312             : 
     313       20169 :         return SUCCESS;
     314             : }
     315             : 
     316         148 : static PHP_MINFO_FUNCTION(bz2)
     317             : {
     318         148 :         php_info_print_table_start();
     319         148 :         php_info_print_table_row(2, "BZip2 Support", "Enabled");
     320         148 :         php_info_print_table_row(2, "Stream Wrapper support", "compress.bzip2://");
     321         148 :         php_info_print_table_row(2, "Stream Filter support", "bzip2.decompress, bzip2.compress");
     322         148 :         php_info_print_table_row(2, "BZip2 Version", (char *) BZ2_bzlibVersion());
     323         148 :         php_info_print_table_end();
     324         148 : }
     325             : 
     326             : /* {{{ proto string bzread(resource bz[, int length])
     327             :    Reads up to length bytes from a BZip2 stream, or 1024 bytes if length is not specified */
     328          16 : static PHP_FUNCTION(bzread)
     329             : {
     330             :         zval *bz;
     331          16 :         long len = 1024;
     332             :         php_stream *stream;
     333             : 
     334          16 :         if (FAILURE == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "r|l", &bz, &len)) {
     335           2 :                 RETURN_FALSE;
     336             :         }
     337             :         
     338          14 :         php_stream_from_zval(stream, &bz);
     339             : 
     340          13 :         if ((len + 1) < 1) {
     341           1 :                 php_error_docref(NULL TSRMLS_CC, E_WARNING, "length may not be negative");
     342           1 :                 RETURN_FALSE;
     343             :         }
     344             : 
     345          12 :         Z_STRVAL_P(return_value) = emalloc(len + 1);
     346          12 :         Z_STRLEN_P(return_value) = php_stream_read(stream, Z_STRVAL_P(return_value), len);
     347             :         
     348          12 :         if (Z_STRLEN_P(return_value) < 0) {
     349           0 :                 efree(Z_STRVAL_P(return_value));
     350           0 :                 php_error_docref(NULL TSRMLS_CC, E_WARNING, "could not read valid bz2 data from stream");
     351           0 :                 RETURN_FALSE;           
     352             :         }
     353             :         
     354          12 :         Z_STRVAL_P(return_value)[Z_STRLEN_P(return_value)] = 0;
     355          12 :         Z_TYPE_P(return_value) = IS_STRING;
     356             : }
     357             : /* }}} */
     358             : 
     359             : /* {{{ proto resource bzopen(string|int file|fp, string mode)
     360             :    Opens a new BZip2 stream */
     361          37 : static PHP_FUNCTION(bzopen)
     362             : {
     363             :         zval    **file;   /* The file to open */
     364             :         char     *mode;   /* The mode to open the stream with */
     365             :         int      mode_len;
     366             : 
     367             :         BZFILE   *bz;     /* The compressed file stream */
     368          37 :         php_stream *stream = NULL;
     369             :         
     370          37 :         if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "Zs", &file, &mode, &mode_len) == FAILURE) {
     371           1 :                 return;
     372             :         }
     373             : 
     374          36 :         if (mode_len != 1 || (mode[0] != 'r' && mode[0] != 'w')) {
     375           3 :                 php_error_docref(NULL TSRMLS_CC, E_WARNING, "'%s' is not a valid mode for bzopen(). Only 'w' and 'r' are supported.", mode);
     376           3 :                 RETURN_FALSE;
     377             :         }
     378             : 
     379             :         /* If it's not a resource its a string containing the filename to open */
     380          33 :         if (Z_TYPE_PP(file) == IS_STRING) {
     381          12 :                 if (Z_STRLEN_PP(file) == 0) {
     382           2 :                         php_error_docref(NULL TSRMLS_CC, E_WARNING, "filename cannot be empty");
     383           2 :                         RETURN_FALSE;
     384             :                 }
     385             :                 
     386          10 :                 if (CHECK_ZVAL_NULL_PATH(*file)) {
     387           0 :                         RETURN_FALSE;
     388             :                 }
     389             : 
     390          10 :                 stream = php_stream_bz2open(NULL,
     391             :                                                                         Z_STRVAL_PP(file), 
     392             :                                                                         mode, 
     393             :                                                                         REPORT_ERRORS, 
     394             :                                                                         NULL);
     395          21 :         } else if (Z_TYPE_PP(file) == IS_RESOURCE) {
     396             :                 /* If it is a resource, than its a stream resource */
     397             :                 int fd;
     398             :                 int stream_mode_len;
     399             : 
     400          19 :                 php_stream_from_zval(stream, file);
     401          19 :                 stream_mode_len = strlen(stream->mode);
     402             :                 
     403          19 :                 if (stream_mode_len != 1 && !(stream_mode_len == 2 && memchr(stream->mode, 'b', 2))) {
     404           8 :                         php_error_docref(NULL TSRMLS_CC, E_WARNING, "cannot use stream opened in mode '%s'", stream->mode);
     405           8 :                         RETURN_FALSE;
     406          11 :                 } else if (stream_mode_len == 1 && stream->mode[0] != 'r' && stream->mode[0] != 'w' && stream->mode[0] != 'a' && stream->mode[0] != 'x') {
     407           0 :                         php_error_docref(NULL TSRMLS_CC, E_WARNING, "cannot use stream opened in mode '%s'", stream->mode);
     408           0 :                         RETURN_FALSE;
     409             :                 }
     410             : 
     411          11 :                 switch(mode[0]) {
     412             :                         case 'r':
     413             :                                 /* only "r" and "rb" are supported */
     414           6 :                                 if (stream->mode[0] != mode[0] && !(stream_mode_len == 2 && stream->mode[1] != mode[0])) {
     415           3 :                                         php_error_docref(NULL TSRMLS_CC, E_WARNING, "cannot read from a stream opened in write only mode");
     416           3 :                                         RETURN_FALSE;
     417             :                                 }
     418           3 :                                 break;
     419             :                         case 'w':
     420             :                                 /* support only "w"(b), "a"(b), "x"(b) */
     421          10 :                                 if (stream->mode[0] != mode[0] && !(stream_mode_len == 2 && stream->mode[1] != mode[0])
     422           3 :                                         && stream->mode[0] != 'a' && !(stream_mode_len == 2 && stream->mode[1] != 'a')
     423           2 :                                         && stream->mode[0] != 'x' && !(stream_mode_len == 2 && stream->mode[1] != 'x')) {
     424           1 :                                         php_error_docref(NULL TSRMLS_CC, E_WARNING, "cannot write to a stream opened in read only mode");
     425           1 :                                         RETURN_FALSE;
     426             :                                 }
     427             :                                 break;
     428             :                         default:
     429             :                                 /* not reachable */
     430             :                                 break;
     431             :                 }
     432             : 
     433           7 :                 if (FAILURE == php_stream_cast(stream, PHP_STREAM_AS_FD, (void *) &fd, REPORT_ERRORS)) {
     434           0 :                         RETURN_FALSE;
     435             :                 }
     436             :                 
     437           7 :                 bz = BZ2_bzdopen(fd, mode);
     438             : 
     439           7 :                 stream = php_stream_bz2open_from_BZFILE(bz, mode, stream);
     440             :         } else {
     441           2 :                 php_error_docref(NULL TSRMLS_CC, E_WARNING, "first parameter has to be string or file-resource");
     442           2 :                 RETURN_FALSE;
     443             :         }
     444             : 
     445          17 :         if (stream) {
     446          16 :                 php_stream_to_zval(stream, return_value);
     447             :         } else {
     448           1 :                 RETURN_FALSE;
     449             :         }
     450             : }
     451             : /* }}} */
     452             : 
     453             : /* {{{ proto int bzerrno(resource bz)
     454             :    Returns the error number */
     455           7 : static PHP_FUNCTION(bzerrno)
     456             : {
     457           7 :         php_bz2_error(INTERNAL_FUNCTION_PARAM_PASSTHRU, PHP_BZ_ERRNO);
     458           7 : }
     459             : /* }}} */
     460             : 
     461             : /* {{{ proto string bzerrstr(resource bz)
     462             :    Returns the error string */
     463           7 : static PHP_FUNCTION(bzerrstr)
     464             : {
     465           7 :         php_bz2_error(INTERNAL_FUNCTION_PARAM_PASSTHRU, PHP_BZ_ERRSTR);
     466           7 : }
     467             : /* }}} */
     468             : 
     469             : /* {{{ proto array bzerror(resource bz)
     470             :    Returns the error number and error string in an associative array */
     471           7 : static PHP_FUNCTION(bzerror)
     472             : {
     473           7 :         php_bz2_error(INTERNAL_FUNCTION_PARAM_PASSTHRU, PHP_BZ_ERRBOTH);
     474           7 : }
     475             : /* }}} */
     476             : 
     477             : /* {{{ proto string bzcompress(string source [, int blocksize100k [, int workfactor]])
     478             :    Compresses a string into BZip2 encoded data */
     479           9 : static PHP_FUNCTION(bzcompress)
     480             : {
     481             :         char             *source;          /* Source data to compress */
     482           9 :         long              zblock_size = 0; /* Optional block size to use */
     483           9 :         long              zwork_factor = 0;/* Optional work factor to use */
     484           9 :         char             *dest = NULL;     /* Destination to place the compressed data into */
     485             :         int               error,           /* Error Container */
     486           9 :                                           block_size  = 4, /* Block size for compression algorithm */
     487           9 :                                           work_factor = 0, /* Work factor for compression algorithm */
     488             :                                           argc;            /* Argument count */
     489             :         int               source_len;      /* Length of the source data */
     490             :         unsigned int      dest_len;        /* Length of the destination buffer */ 
     491             : 
     492           9 :         argc = ZEND_NUM_ARGS();
     493             : 
     494           9 :         if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|ll", &source, &source_len, &zblock_size, &zwork_factor) == FAILURE) {
     495           1 :                 return;
     496             :         }
     497             : 
     498             :         /* Assign them to easy to use variables, dest_len is initially the length of the data
     499             :            + .01 x length of data + 600 which is the largest size the results of the compression 
     500             :            could possibly be, at least that's what the libbz2 docs say (thanks to jeremy@nirvani.net 
     501             :            for pointing this out).  */
     502           8 :         dest_len   = (unsigned int) (source_len + (0.01 * source_len) + 600);
     503             :         
     504             :         /* Allocate the destination buffer */
     505           8 :         dest = emalloc(dest_len + 1);
     506             :         
     507             :         /* Handle the optional arguments */
     508           8 :         if (argc > 1) {
     509           6 :                 block_size = zblock_size;
     510             :         }
     511             :         
     512           8 :         if (argc > 2) {
     513           5 :                 work_factor = zwork_factor;
     514             :         }
     515             : 
     516           8 :         error = BZ2_bzBuffToBuffCompress(dest, &dest_len, source, source_len, block_size, 0, work_factor);
     517           8 :         if (error != BZ_OK) {
     518           4 :                 efree(dest);
     519           4 :                 RETURN_LONG(error);
     520             :         } else {
     521             :                 /* Copy the buffer, we have perhaps allocate a lot more than we need,
     522             :                    so we erealloc() the buffer to the proper size */
     523           4 :                 dest = erealloc(dest, dest_len + 1);
     524           4 :                 dest[dest_len] = 0;
     525           4 :                 RETURN_STRINGL(dest, dest_len, 0);
     526             :         }
     527             : }
     528             : /* }}} */
     529             : 
     530             : /* {{{ proto string bzdecompress(string source [, int small])
     531             :    Decompresses BZip2 compressed data */
     532          11 : static PHP_FUNCTION(bzdecompress)
     533             : {
     534             :         char *source, *dest;
     535             :         int source_len, error;
     536          11 :         long small = 0;
     537             : #if defined(PHP_WIN32)
     538             :         unsigned __int64 size = 0;
     539             : #else
     540          11 :         unsigned long long size = 0;
     541             : #endif
     542             :         bz_stream bzs;
     543             : 
     544          11 :         if (FAILURE == zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|l", &source, &source_len, &small)) {
     545           2 :                 RETURN_FALSE;
     546             :         }
     547             : 
     548           9 :         bzs.bzalloc = NULL;
     549           9 :         bzs.bzfree = NULL;
     550             : 
     551           9 :         if (BZ2_bzDecompressInit(&bzs, 0, small) != BZ_OK) {
     552           2 :                 RETURN_FALSE;
     553             :         }
     554             : 
     555           7 :         bzs.next_in = source;
     556           7 :         bzs.avail_in = source_len;
     557             : 
     558             :         /* in most cases bz2 offers at least 2:1 compression, so we use that as our base */
     559           7 :         bzs.avail_out = source_len * 2;
     560           7 :         bzs.next_out = dest = emalloc(bzs.avail_out + 1);
     561             :         
     562          14 :         while ((error = BZ2_bzDecompress(&bzs)) == BZ_OK && bzs.avail_in > 0) {
     563             :                 /* compression is better then 2:1, need to allocate more memory */
     564           0 :                 bzs.avail_out = source_len;
     565           0 :                 size = (bzs.total_out_hi32 * (unsigned int) -1) + bzs.total_out_lo32;
     566           0 :                 dest = safe_erealloc(dest, 1, bzs.avail_out+1, (size_t) size );
     567           0 :                 bzs.next_out = dest + size;
     568             :         }
     569             : 
     570          11 :         if (error == BZ_STREAM_END || error == BZ_OK) {
     571           4 :                 size = (bzs.total_out_hi32 * (unsigned int) -1) + bzs.total_out_lo32;
     572           4 :                 dest = safe_erealloc(dest, 1, (size_t) size, 1);
     573           4 :                 dest[size] = '\0';
     574           4 :                 RETVAL_STRINGL(dest, (int) size, 0);
     575             :         } else { /* real error */
     576           3 :                 efree(dest);
     577           3 :                 RETVAL_LONG(error);
     578             :         }
     579             : 
     580           7 :         BZ2_bzDecompressEnd(&bzs);
     581             : }
     582             : /* }}} */
     583             : 
     584             : /* {{{ php_bz2_error()
     585             :    The central error handling interface, does the work for bzerrno, bzerrstr and bzerror */
     586          21 : static void php_bz2_error(INTERNAL_FUNCTION_PARAMETERS, int opt)
     587             : { 
     588             :         zval         *bzp;     /* BZip2 Resource Pointer */
     589             :         php_stream   *stream;
     590             :         const char   *errstr;  /* Error string */
     591             :         int           errnum;  /* Error number */
     592             :         struct php_bz2_stream_data_t *self;
     593             :         
     594          21 :         if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "r", &bzp) == FAILURE) {
     595           0 :                 return;
     596             :         }
     597             : 
     598          21 :         php_stream_from_zval(stream, &bzp);
     599             : 
     600          18 :         if (!php_stream_is(stream, PHP_STREAM_IS_BZIP2)) {
     601           0 :                 RETURN_FALSE;
     602             :         }
     603             : 
     604          18 :         self = (struct php_bz2_stream_data_t *) stream->abstract;
     605             :         
     606             :         /* Fetch the error information */
     607          18 :         errstr = BZ2_bzerror(self->bz_file, &errnum);
     608             :         
     609             :         /* Determine what to return */
     610          18 :         switch (opt) {
     611             :                 case PHP_BZ_ERRNO:
     612           6 :                         RETURN_LONG(errnum);
     613             :                         break;
     614             :                 case PHP_BZ_ERRSTR:
     615           6 :                         RETURN_STRING((char*)errstr, 1);
     616             :                         break;
     617             :                 case PHP_BZ_ERRBOTH:
     618           6 :                         array_init(return_value);
     619             :                 
     620           6 :                         add_assoc_long  (return_value, "errno",  errnum);
     621           6 :                         add_assoc_string(return_value, "errstr", (char*)errstr, 1);
     622             :                         break;
     623             :         }
     624             : }
     625             : /* }}} */
     626             : 
     627             : #endif
     628             : 
     629             : /*
     630             :  * Local variables:
     631             :  * tab-width: 4
     632             :  * c-basic-offset: 4
     633             :  * End:
     634             :  * vim600: fdm=marker
     635             :  * vim: noet sw=4 ts=4
     636             :  */

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